They are a little aggresive sounding, but I like them.
I'm running a stock bottom end 318 with Edelbrock intake and carb, and 1 5/8 long tube with 3" collectors and 2.5 X piped exiting in front of the rear tires.
Of course the exhaust is way overkill for a stock 318, but it isn't always going to be a 318. :-D